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OPERATION
EATON Powerware
®
9155 Parallel UPS (8–15 kVA) User’s Guide S 164201592 Rev C www.powerware.com
51
Individual UPS Shutdown
To shut down a single UPS in the parallel system:
1. Press any button on the front panel display to activate the menu
options.
2. Press the
button on the front panel display and then press the
button to select the TURN UPS ON/OFF menu.
3. Press the
button to select the UPS Off option; press the
button.
4. Confirm the selection. Press and hold the
button for three
seconds, until the UPS stops beeping.
The input contactor opens.
5. Switch the UPS battery circuit breaker to the OFF position.
The UPS is disconnected from the batteries and is on logic power
only.
6. Switch the UPS breaker on the parallel tie cabinet to the OFF
position.
NOTE If there is only one breaker for all UPSs, do not switch off utility power until all UPSs
are shut down.
7. Switch off utility power where the UPS is connected.
If you are shutting down all the UPSs in a parallel system, repeat
Steps 2 through 6 for each UPS then remove utility power.